1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char rcsid[] = 34 "$FreeBSD$"; 35 #endif /* not lint */ 36 37 #include <sys/param.h> 38 #include <sys/ioctl.h> 39 #include <sys/socket.h> 40 #include <net/if.h> 41 42 #include <err.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <unistd.h> 47 #include <time.h> 48 #include <ifaddrs.h> 49 50 #include <arpa/inet.h> 51 52 #include <netinet/in.h> 53 #include <netinet/in_var.h> 54 #include <arpa/inet.h> 55 #include <netdb.h> 56 57 #include <netinet6/nd6.h> /* Define ND6_INFINITE_LIFETIME */ 58 59 #include "ifconfig.h" 60 61 static struct in6_ifreq in6_ridreq; 62 static struct in6_aliasreq in6_addreq = 63 { .ifra_flags = 0, 64 .ifra_lifetime = { 0, 0, ND6_INFINITE_LIFETIME, ND6_INFINITE_LIFETIME } }; 65 static int ip6lifetime; 66 67 static int prefix(void *, int); 68 static char *sec2str(time_t); 69 static int explicit_prefix = 0; 70 extern char *f_inet6, *f_addr; 71 72 extern void setnd6flags(const char *, int, int, const struct afswtch *); 73 extern void setnd6defif(const char *, int, int, const struct afswtch *); 74 extern void nd6_status(int); 75 76 static char addr_buf[NI_MAXHOST]; /*for getnameinfo()*/ 77 78 static void 79 setifprefixlen(const char *addr, int dummy __unused, int s, 80 const struct afswtch *afp) 81 { 82 if (afp->af_getprefix != NULL) 83 afp->af_getprefix(addr, MASK); 84 explicit_prefix = 1; 85 } 86 87 static void 88 setip6flags(const char *dummyaddr __unused, int flag, int dummysoc __unused, 89 const struct afswtch *afp) 90 { 91 if (afp->af_af != AF_INET6) 92 err(1, "address flags can be set only for inet6 addresses"); 93 94 if (flag < 0) 95 in6_addreq.ifra_flags &= ~(-flag); 96 else 97 in6_addreq.ifra_flags |= flag; 98 } 99 100 static void 101 setip6lifetime(const char *cmd, const char *val, int s, 102 const struct afswtch *afp) 103 { 104 struct timespec now; 105 time_t newval; 106 char *ep; 107 108 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 109 newval = (time_t)strtoul(val, &ep, 0); 110 if (val == ep) 111 errx(1, "invalid %s", cmd); 112 if (afp->af_af != AF_INET6) 113 errx(1, "%s not allowed for the AF", cmd); 114 if (strcmp(cmd, "vltime") == 0) { 115 in6_addreq.ifra_lifetime.ia6t_expire = now.tv_sec + newval; 116 in6_addreq.ifra_lifetime.ia6t_vltime = newval; 117 } else if (strcmp(cmd, "pltime") == 0) { 118 in6_addreq.ifra_lifetime.ia6t_preferred = now.tv_sec + newval; 119 in6_addreq.ifra_lifetime.ia6t_pltime = newval; 120 } 121 } 122 123 static void 124 setip6pltime(const char *seconds, int dummy __unused, int s, 125 const struct afswtch *afp) 126 { 127 setip6lifetime("pltime", seconds, s, afp); 128 } 129 130 static void 131 setip6vltime(const char *seconds, int dummy __unused, int s, 132 const struct afswtch *afp) 133 { 134 setip6lifetime("vltime", seconds, s, afp); 135 } 136 137 static void 138 setip6eui64(const char *cmd, int dummy __unused, int s, 139 const struct afswtch *afp) 140 { 141 struct ifaddrs *ifap, *ifa; 142 const struct sockaddr_in6 *sin6 = NULL; 143 const struct in6_addr *lladdr = NULL; 144 struct in6_addr *in6; 145 146 if (afp->af_af != AF_INET6) 147 errx(EXIT_FAILURE, "%s not allowed for the AF", cmd); 148 in6 = (struct in6_addr *)&in6_addreq.ifra_addr.sin6_addr; 149 if (memcmp(&in6addr_any.s6_addr[8], &in6->s6_addr[8], 8) != 0) 150 errx(EXIT_FAILURE, "interface index is already filled"); 151 if (getifaddrs(&ifap) != 0) 152 err(EXIT_FAILURE, "getifaddrs"); 153 for (ifa = ifap; ifa; ifa = ifa->ifa_next) { 154 if (ifa->ifa_addr->sa_family == AF_INET6 && 155 strcmp(ifa->ifa_name, name) == 0) { 156 sin6 = (const struct sockaddr_in6 *)ifa->ifa_addr; 157 if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) { 158 lladdr = &sin6->sin6_addr; 159 break; 160 } 161 } 162 } 163 if (!lladdr) 164 errx(EXIT_FAILURE, "could not determine link local address"); 165 166 memcpy(&in6->s6_addr[8], &lladdr->s6_addr[8], 8); 167 168 freeifaddrs(ifap); 169 } 170 171 static void 172 in6_status(int s __unused, const struct ifaddrs *ifa) 173 { 174 struct sockaddr_in6 *sin, null_sin; 175 struct in6_ifreq ifr6; 176 int s6; 177 u_int32_t flags6; 178 struct in6_addrlifetime lifetime; 179 struct timespec now; 180 int error, n_flags; 181 182 clock_gettime(CLOCK_MONOTONIC_FAST, &now); 183 184 memset(&null_sin, 0, sizeof(null_sin)); 185 186 sin = (struct sockaddr_in6 *)ifa->ifa_addr; 187 if (sin == NULL) 188 return; 189 190 strlcpy(ifr6.ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); 191 if ((s6 = socket(AF_INET6, SOCK_DGRAM, 0)) < 0) { 192 warn("socket(AF_INET6,SOCK_DGRAM)"); 193 return; 194 } 195 ifr6.ifr_addr = *sin; 196 if (ioctl(s6, SIOCGIFAFLAG_IN6, &ifr6) < 0) { 197 warn("ioctl(SIOCGIFAFLAG_IN6)"); 198 close(s6); 199 return; 200 } 201 flags6 = ifr6.ifr_ifru.ifru_flags6; 202 memset(&lifetime, 0, sizeof(lifetime)); 203 ifr6.ifr_addr = *sin; 204 if (ioctl(s6, SIOCGIFALIFETIME_IN6, &ifr6) < 0) { 205 warn("ioctl(SIOCGIFALIFETIME_IN6)"); 206 close(s6); 207 return; 208 } 209 lifetime = ifr6.ifr_ifru.ifru_lifetime; 210 close(s6); 211 212 if (f_addr != NULL && strcmp(f_addr, "fqdn") == 0) 213 n_flags = 0; 214 else if (f_addr != NULL && strcmp(f_addr, "host") == 0) 215 n_flags = NI_NOFQDN; 216 else 217 n_flags = NI_NUMERICHOST; 218 error = getnameinfo((struct sockaddr *)sin, sin->sin6_len, 219 addr_buf, sizeof(addr_buf), NULL, 0, 220 n_flags); 221 if (error != 0) 222 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 223 sizeof(addr_buf)); 224 printf("\tinet6 %s", addr_buf); 225 226 if (ifa->ifa_flags & IFF_POINTOPOINT) { 227 sin = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 228 /* 229 * some of the interfaces do not have valid destination 230 * address. 231 */ 232 if (sin != NULL && sin->sin6_family == AF_INET6) { 233 int error; 234 235 error = getnameinfo((struct sockaddr *)sin, 236 sin->sin6_len, addr_buf, 237 sizeof(addr_buf), NULL, 0, 238 NI_NUMERICHOST); 239 if (error != 0) 240 inet_ntop(AF_INET6, &sin->sin6_addr, addr_buf, 241 sizeof(addr_buf)); 242 printf(" --> %s", addr_buf); 243 } 244 } 245 246 sin = (struct sockaddr_in6 *)ifa->ifa_netmask; 247 if (sin == NULL) 248 sin = &null_sin; 249 if (f_inet6 != NULL && strcmp(f_inet6, "cidr") == 0) 250 printf("/%d", prefix(&sin->sin6_addr, 251 sizeof(struct in6_addr))); 252 else 253 printf(" prefixlen %d", prefix(&sin->sin6_addr, 254 sizeof(struct in6_addr))); 255 256 if ((flags6 & IN6_IFF_ANYCAST) != 0) 257 printf(" anycast"); 258 if ((flags6 & IN6_IFF_TENTATIVE) != 0) 259 printf(" tentative"); 260 if ((flags6 & IN6_IFF_DUPLICATED) != 0) 261 printf(" duplicated"); 262 if ((flags6 & IN6_IFF_DETACHED) != 0) 263 printf(" detached"); 264 if ((flags6 & IN6_IFF_DEPRECATED) != 0) 265 printf(" deprecated"); 266 if ((flags6 & IN6_IFF_AUTOCONF) != 0) 267 printf(" autoconf"); 268 if ((flags6 & IN6_IFF_TEMPORARY) != 0) 269 printf(" temporary"); 270 if ((flags6 & IN6_IFF_PREFER_SOURCE) != 0) 271 printf(" prefer_source"); 272 273 if (((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id) 274 printf(" scopeid 0x%x", 275 ((struct sockaddr_in6 *)(ifa->ifa_addr))->sin6_scope_id); 276 277 if (ip6lifetime && (lifetime.ia6t_preferred || lifetime.ia6t_expire)) { 278 printf(" pltime"); 279 if (lifetime.ia6t_preferred) { 280 printf(" %s", lifetime.ia6t_preferred < now.tv_sec 281 ? "0" : 282 sec2str(lifetime.ia6t_preferred - now.tv_sec)); 283 } else 284 printf(" infty"); 285 286 printf(" vltime"); 287 if (lifetime.ia6t_expire) { 288 printf(" %s", lifetime.ia6t_expire < now.tv_sec 289 ? "0" : 290 sec2str(lifetime.ia6t_expire - now.tv_sec)); 291 } else 292 printf(" infty"); 293 } 294 295 print_vhid(ifa, " "); 296 297 putchar('\n'); 298 } 299 300 #define SIN6(x) ((struct sockaddr_in6 *) &(x)) 301 static struct sockaddr_in6 *sin6tab[] = { 302 SIN6(in6_ridreq.ifr_addr), SIN6(in6_addreq.ifra_addr), 303 SIN6(in6_addreq.ifra_prefixmask), SIN6(in6_addreq.ifra_dstaddr) 304 }; 305 306 static void 307 in6_getprefix(const char *plen, int which) 308 { 309 struct sockaddr_in6 *sin = sin6tab[which]; 310 u_char *cp; 311 int len = atoi(plen); 312 313 if ((len < 0) || (len > 128)) 314 errx(1, "%s: bad value", plen); 315 sin->sin6_len = sizeof(*sin); 316 if (which != MASK) 317 sin->sin6_family = AF_INET6; 318 if ((len == 0) || (len == 128)) { 319 memset(&sin->sin6_addr, 0xff, sizeof(struct in6_addr)); 320 return; 321 } 322 memset((void *)&sin->sin6_addr, 0x00, sizeof(sin->sin6_addr)); 323 for (cp = (u_char *)&sin->sin6_addr; len > 7; len -= 8) 324 *cp++ = 0xff; 325 *cp = 0xff << (8 - len); 326 } 327 328 static void 329 in6_getaddr(const char *s, int which) 330 { 331 struct sockaddr_in6 *sin = sin6tab[which]; 332 struct addrinfo hints, *res; 333 int error = -1; 334 335 newaddr &= 1; 336 337 sin->sin6_len = sizeof(*sin); 338 if (which != MASK) 339 sin->sin6_family = AF_INET6; 340 341 if (which == ADDR) { 342 char *p = NULL; 343 if((p = strrchr(s, '/')) != NULL) { 344 *p = '\0'; 345 in6_getprefix(p + 1, MASK); 346 explicit_prefix = 1; 347 } 348 } 349 350 if (sin->sin6_family == AF_INET6) { 351 bzero(&hints, sizeof(struct addrinfo)); 352 hints.ai_family = AF_INET6; 353 error = getaddrinfo(s, NULL, &hints, &res); 354 if (error != 0) { 355 if (inet_pton(AF_INET6, s, &sin->sin6_addr) != 1) 356 errx(1, "%s: bad value", s); 357 } else { 358 bcopy(res->ai_addr, sin, res->ai_addrlen); 359 freeaddrinfo(res); 360 } 361 } 362 } 363 364 static int 365 prefix(void *val, int size) 366 { 367 u_char *name = (u_char *)val; 368 int byte, bit, plen = 0; 369 370 for (byte = 0; byte < size; byte++, plen += 8) 371 if (name[byte] != 0xff) 372 break; 373 if (byte == size) 374 return (plen); 375 for (bit = 7; bit != 0; bit--, plen++) 376 if (!(name[byte] & (1 << bit))) 377 break; 378 for (; bit != 0; bit--) 379 if (name[byte] & (1 << bit)) 380 return(0); 381 byte++; 382 for (; byte < size; byte++) 383 if (name[byte]) 384 return(0); 385 return (plen); 386 } 387 388 static char * 389 sec2str(time_t total) 390 { 391 static char result[256]; 392 int days, hours, mins, secs; 393 int first = 1; 394 char *p = result; 395 396 if (0) { 397 days = total / 3600 / 24; 398 hours = (total / 3600) % 24; 399 mins = (total / 60) % 60; 400 secs = total % 60; 401 402 if (days) { 403 first = 0; 404 p += sprintf(p, "%dd", days); 405 } 406 if (!first || hours) { 407 first = 0; 408 p += sprintf(p, "%dh", hours); 409 } 410 if (!first || mins) { 411 first = 0; 412 p += sprintf(p, "%dm", mins); 413 } 414 sprintf(p, "%ds", secs); 415 } else 416 sprintf(result, "%lu", (unsigned long)total); 417 418 return(result); 419 } 420 421 static void 422 in6_postproc(int s, const struct afswtch *afp, int newaddr __unused, 423 int ifflags __unused) 424 { 425 if (explicit_prefix == 0) { 426 /* Aggregatable address architecture defines all prefixes 427 are 64. So, it is convenient to set prefixlen to 64 if 428 it is not specified. */ 429 setifprefixlen("64", 0, s, afp); 430 /* in6_getprefix("64", MASK) if MASK is available here... */ 431 } 432 } 433 434 static void 435 in6_status_tunnel(int s) 436 { 437 char src[NI_MAXHOST]; 438 char dst[NI_MAXHOST]; 439 struct in6_ifreq in6_ifr; 440 const struct sockaddr *sa = (const struct sockaddr *) &in6_ifr.ifr_addr; 441 442 memset(&in6_ifr, 0, sizeof(in6_ifr)); 443 strlcpy(in6_ifr.ifr_name, name, sizeof(in6_ifr.ifr_name)); 444 445 if (ioctl(s, SIOCGIFPSRCADDR_IN6, (caddr_t)&in6_ifr) < 0) 446 return; 447 if (sa->sa_family != AF_INET6) 448 return; 449 if (getnameinfo(sa, sa->sa_len, src, sizeof(src), 0, 0, 450 NI_NUMERICHOST) != 0) 451 src[0] = '\0'; 452 453 if (ioctl(s, SIOCGIFPDSTADDR_IN6, (caddr_t)&in6_ifr) < 0) 454 return; 455 if (sa->sa_family != AF_INET6) 456 return; 457 if (getnameinfo(sa, sa->sa_len, dst, sizeof(dst), 0, 0, 458 NI_NUMERICHOST) != 0) 459 dst[0] = '\0'; 460 461 printf("\ttunnel inet6 %s --> %s\n", src, dst); 462 } 463 464 static void 465 in6_set_tunnel(int s, struct addrinfo *srcres, struct addrinfo *dstres) 466 { 467 struct in6_aliasreq in6_addreq; 468 469 memset(&in6_addreq, 0, sizeof(in6_addreq)); 470 strlcpy(in6_addreq.ifra_name, name, sizeof(in6_addreq.ifra_name)); 471 memcpy(&in6_addreq.ifra_addr, srcres->ai_addr, srcres->ai_addr->sa_len); 472 memcpy(&in6_addreq.ifra_dstaddr, dstres->ai_addr, 473 dstres->ai_addr->sa_len); 474 475 if (ioctl(s, SIOCSIFPHYADDR_IN6, &in6_addreq) < 0) 476 warn("SIOCSIFPHYADDR_IN6"); 477 } 478 479 static struct cmd inet6_cmds[] = { 480 DEF_CMD_ARG("prefixlen", setifprefixlen), 481 DEF_CMD("anycast", IN6_IFF_ANYCAST, setip6flags), 482 DEF_CMD("tentative", IN6_IFF_TENTATIVE, setip6flags), 483 DEF_CMD("-tentative", -IN6_IFF_TENTATIVE, setip6flags), 484 DEF_CMD("deprecated", IN6_IFF_DEPRECATED, setip6flags), 485 DEF_CMD("-deprecated", -IN6_IFF_DEPRECATED, setip6flags), 486 DEF_CMD("autoconf", IN6_IFF_AUTOCONF, setip6flags), 487 DEF_CMD("-autoconf", -IN6_IFF_AUTOCONF, setip6flags), 488 DEF_CMD("prefer_source",IN6_IFF_PREFER_SOURCE, setip6flags), 489 DEF_CMD("-prefer_source",-IN6_IFF_PREFER_SOURCE,setip6flags), 490 DEF_CMD("accept_rtadv", ND6_IFF_ACCEPT_RTADV, setnd6flags), 491 DEF_CMD("-accept_rtadv",-ND6_IFF_ACCEPT_RTADV, setnd6flags), 492 DEF_CMD("no_radr", ND6_IFF_NO_RADR, setnd6flags), 493 DEF_CMD("-no_radr", -ND6_IFF_NO_RADR, setnd6flags), 494 DEF_CMD("defaultif", 1, setnd6defif), 495 DEF_CMD("-defaultif", -1, setnd6defif), 496 DEF_CMD("ifdisabled", ND6_IFF_IFDISABLED, setnd6flags), 497 DEF_CMD("-ifdisabled", -ND6_IFF_IFDISABLED, setnd6flags), 498 DEF_CMD("nud", ND6_IFF_PERFORMNUD, setnd6flags), 499 DEF_CMD("-nud", -ND6_IFF_PERFORMNUD, setnd6flags), 500 DEF_CMD("auto_linklocal",ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 501 DEF_CMD("-auto_linklocal",-ND6_IFF_AUTO_LINKLOCAL,setnd6flags), 502 DEF_CMD("no_prefer_iface",ND6_IFF_NO_PREFER_IFACE,setnd6flags), 503 DEF_CMD("-no_prefer_iface",-ND6_IFF_NO_PREFER_IFACE,setnd6flags), 504 DEF_CMD("no_dad", ND6_IFF_NO_DAD, setnd6flags), 505 DEF_CMD("-no_dad", -ND6_IFF_NO_DAD, setnd6flags), 506 DEF_CMD_ARG("pltime", setip6pltime), 507 DEF_CMD_ARG("vltime", setip6vltime), 508 DEF_CMD("eui64", 0, setip6eui64), 509 #ifdef EXPERIMENTAL 510 DEF_CMD("ipv6_only", ND6_IFF_IPV6_ONLY_MANUAL,setnd6flags), 511 DEF_CMD("-ipv6_only", -ND6_IFF_IPV6_ONLY_MANUAL,setnd6flags), 512 #endif 513 }; 514 515 static struct afswtch af_inet6 = { 516 .af_name = "inet6", 517 .af_af = AF_INET6, 518 .af_status = in6_status, 519 .af_getaddr = in6_getaddr, 520 .af_getprefix = in6_getprefix, 521 .af_other_status = nd6_status, 522 .af_postproc = in6_postproc, 523 .af_status_tunnel = in6_status_tunnel, 524 .af_settunnel = in6_set_tunnel, 525 .af_difaddr = SIOCDIFADDR_IN6, 526 .af_aifaddr = SIOCAIFADDR_IN6, 527 .af_ridreq = &in6_addreq, 528 .af_addreq = &in6_addreq, 529 }; 530 531 static void 532 in6_Lopt_cb(const char *optarg __unused) 533 { 534 ip6lifetime++; /* print IPv6 address lifetime */ 535 } 536 static struct option in6_Lopt = { 537 .opt = "L", 538 .opt_usage = "[-L]", 539 .cb = in6_Lopt_cb 540 }; 541 542 static __constructor void 543 inet6_ctor(void) 544 { 545 size_t i; 546 547 #ifndef RESCUE 548 if (!feature_present("inet6")) 549 return; 550 #endif 551 552 for (i = 0; i < nitems(inet6_cmds); i++) 553 cmd_register(&inet6_cmds[i]); 554 af_register(&af_inet6); 555 opt_register(&in6_Lopt); 556 } 557